A cell picker's content: a PickList of the items with the keyboard, and a search field
when the host asks for one.
Remarks
The panel does not know who opened it or what a choice does: the list validation enters the pick
as typed text, the totals row writes a formula, a preview only closes. The current value's row is
highlighted so a keyboard pick starts from it.
A cell picker's content: a PickList of the items with the keyboard, and a search field when the host asks for one.